From: Gabe Black <gblack@eecs.umich.edu>
Date: Tue, 25 Mar 2008 06:15:23 +0000 (-0400)
Subject: X86: Put an RTC into the CMOS part of the southbridge.
X-Git-Tag: copyright_update~10^2
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=93dd1978a7750ba7cce04ae4401f5c6689290038;p=gem5.git

X86: Put an RTC into the CMOS part of the southbridge.

--HG--
extra : convert_revision : a614373236fe75db6e6181fc152a02b541a131f3
---

diff --git a/src/dev/x86/south_bridge/cmos.cc b/src/dev/x86/south_bridge/cmos.cc
index 43ada42e8..164b23d84 100644
--- a/src/dev/x86/south_bridge/cmos.cc
+++ b/src/dev/x86/south_bridge/cmos.cc
@@ -71,27 +71,10 @@ uint8_t
 X86ISA::Cmos::readRegister(uint8_t reg)
 {
     assert(reg < numRegs);
-    switch(reg)
-    {
-      case 0x0:
-      case 0x1:
-      case 0x2:
-      case 0x3:
-      case 0x4:
-      case 0x5:
-      case 0x6:
-      case 0x7:
-      case 0x8:
-      case 0x9:
-      case 0xA:
-      case 0xB:
-      case 0xC:
-      case 0xD:
-        warn("Reading RTC in the CMOS.\n");
-        break;
-      default:
+    if (reg <= 0xD) {
+        return rtc.readData(reg);
+    } else {
         warn("Reading non-volitile CMOS address %x as %x.\n", reg, regs[reg]);
-        break;
     }
     return regs[reg];
 }
@@ -100,27 +83,11 @@ void
 X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
 {
     assert(reg < numRegs);
-    switch(reg)
-    {
-      case 0x0:
-      case 0x1:
-      case 0x2:
-      case 0x3:
-      case 0x4:
-      case 0x5:
-      case 0x6:
-      case 0x7:
-      case 0x8:
-      case 0x9:
-      case 0xA:
-      case 0xB:
-      case 0xC:
-      case 0xD:
-        warn("Writing RTC in the CMOS.\n");
-        break;
-      default:
+    if (reg <= 0xD) {
+        rtc.writeData(reg, val);
+        return;
+    } else {
         warn("Writing non-volitile CMOS address %x with %x.\n", reg, val);
-        break;
     }
     regs[reg] = val;
 }
diff --git a/src/dev/x86/south_bridge/cmos.hh b/src/dev/x86/south_bridge/cmos.hh
index cd3fab280..6fd7613bc 100644
--- a/src/dev/x86/south_bridge/cmos.hh
+++ b/src/dev/x86/south_bridge/cmos.hh
@@ -33,6 +33,7 @@
 
 #include "arch/x86/x86_traits.hh"
 #include "base/range.hh"
+#include "dev/mc146818.hh"
 #include "dev/x86/south_bridge/sub_device.hh"
 
 namespace X86ISA
@@ -43,6 +44,8 @@ class Cmos : public SubDevice
   protected:
     uint8_t address;
 
+    struct tm foo_time;
+
     static const int numRegs = 128;
 
     uint8_t regs[numRegs];
@@ -50,22 +53,38 @@ class Cmos : public SubDevice
     uint8_t readRegister(uint8_t reg);
     void writeRegister(uint8_t reg, uint8_t val);
 
+    class X86RTC : public MC146818
+    {
+      public:
+        X86RTC(const std::string &n, const struct tm time,
+                bool bcd, Tick frequency) : MC146818(n, time, bcd, frequency)
+        {
+        }
+      protected:
+        void handleEvent()
+        {
+            return;
+        }
+    } rtc;
+
   public:
 
-    Cmos()
+    Cmos() : rtc("rtc", foo_time, true, 5000000000)
     {
         memset(regs, 0, numRegs * sizeof(uint8_t));
         address = 0;
     }
 
-    Cmos(Tick _latency) : SubDevice(_latency)
+    Cmos(Tick _latency) : SubDevice(_latency),
+        rtc("rtc", foo_time, true, 5000000000)
     {
         memset(regs, 0, numRegs * sizeof(uint8_t));
         address = 0;
     }
 
     Cmos(Addr start, Addr size, Tick _latency) :
-        SubDevice(start, size, _latency)
+        SubDevice(start, size, _latency),
+        rtc("rtc", foo_time, true, 5000000000)
     {
         memset(regs, 0, numRegs * sizeof(uint8_t));
         address = 0;